SP-550 spark plug
Thread Starter
|
Mountain Pass
Joined: Jan 2013
Posts: 184
Likes: 1
SP-550 spark plug
When looking online for a 2015 Navigator manual, the spark plug needed shows SP-534. I have six SP-550 and was wondering if I can use those in this vehicle that is all stock? Thanks.
Laughing Gas
Joined: Oct 2013
Posts: 861
Likes: 7
From: AZ
I'd only use what the manual says but there are a lot of compatible plugs out there. Just remember to gap them a little tighter than they come. I gapped mine to around .030. Most dont need that small but a coworker has a tuner on his ecoboost and was getting a misfire at high rpms because of the higher boost/combustion pressures and a tighter gap solved the issue.
Thread
Thread Starter
Forum
Replies
Last Post
1975-F6004x4Dump
1973 - 1979 F-100 & Larger F-Series Trucks
1
Feb 12, 2014 12:41 PM
limakid
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
0
Oct 24, 2005 06:32 PM
dustinleavitt2000
335 Series- 5.8/351M, 6.6/400, 351 Cleveland
4
Jun 15, 2003 05:29 AM
